With a standard multi ban (assuming first offense, and no additional incriminating information tied to other violations) one account can return after a month with some asset loss. The other accounts remain banned, and normal inactivity purging applies - or lack thereof, in case of level 2+ accounts. They remain in the database indefinitely.

With any other type of ban the duration simply depends on the specific punishment for it. At this time no precise scale for other punishments exist, and it varies widely depending on the rule being violated and the magnitude of violation. However, the inactivity deletion rules remain the same and banned accounts are not removed under any circumstances that are different from accounts that are not banned.